I don't know if this is a sleep or hunger problem so I'll post in both sections!
My DD#2 is now 5.5 months. For the first 12 weeks she was quite a good sleeper starting off with sleeping at least one four hour stretch during the night. This got longer until she reached 12 weeks and since then her sleep has been getting worse and worse.
She currently wakes every 1.5-2 hours some nights and other nights every hour, but does at least then sleep for 2.5 hours once!
I'm breastfeeding and so when she wakes I feed her, but I'm not convinced she's always waking because of hunger. Feeding her seems to be the quickest way of getting her to go back to sleep without waking DD#1, but I am so tired and don't think I'm coping with it very well any more.
I've tried putting her in her own room, putting an extra blanket on her, gloves so her hands aren't cold. I've spoken to a HV who suggested weaning her so I've started, but I don't think that will make much if any difference any time soon.
I know she will have had growth spurts and there's a sleep regression that people talk of around 4 months, but it's been two and a half months since we've had a decent night (ie 4 hours of sleep!)
Any suggestions?